<template>
  <div>
    <el-breadcrumb separator-class='el-icon-arrow-right'>
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert
        title='注意：只允许为第三级分类设置相关参数！'
        :closable='false'
        show-icon
        type='warning'>
      </el-alert>
      <el-row class='cat_opt'>
        <el-col>
          <span>选择商品分类：</span>
          <el-cascader
            v-model='selectedCateKeys'
            :options='catelist'
            :props='cateProps'
            @change='handleChange'>
          </el-cascader>
        </el-col>
      </el-row>
      <el-tabs v-model='activeName' @tab-click='handleTabClick'>
        <el-tab-pane label='动态参数' name='many'>
          <el-button type='primary' size='mini' :disabled='isButtonDisable' @click='addDialogVisible=true'>添加参数
          </el-button>
          <el-table :data='manyTableData' border stripe>
            <el-table-column type='expand'>
              <template slot-scope="scope">
                <el-tag v-for="(item,i) in scope.row.attr_vals" :key='i' closable @close="handleClose(i,scope.row)">
                  {{item}}
                </el-tag>
                <el-input
                class="input-new-tag"
                v-if="scope.row.inputVisible"
                v-model="scope.row.inputValue"
                ref="saveTagInput"
                size="small"
                @keyup.enter.native="handleInputConfirm(scope.row)"
                @blur="handleInputConfirm(scope.row)"
              >
              </el-input>
              <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type='index' :resizable='false' label='#'></el-table-column>
            <el-table-column label='参数名称' prop='attr_name'></el-table-column>
            <el-table-column label='操作'>
              <template slot-scope='scope'>
                <el-button type='primary' icon='el-icon-edit' size='mini' @click='showEditDialog(scope.row.attr_id)'>
                  编辑
                </el-button>
                <el-button type='danger' icon='el-icon-delete' size='mini' @click='removeParams(scope.row.attr_id)'>删除
                </el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label='静态属性' name='only'>
          <el-button type='primary' size='mini' :disabled='isButtonDisable' @click='addDialogVisible=true'>添加属性
          </el-button>
          <el-table :data='onlyTableData' border stripe>
            <el-table-column type='expand'>
              <template slot-scope="scope">
                <el-tag v-for="(item,i) in scope.row.attr_vals" :key='i' closable @close="handleClose(i,scope.row)">
                  {{item}}
                </el-tag>
                <el-input
                class="input-new-tag"
                v-if="scope.row.inputVisible"
                v-model="scope.row.inputValue"
                ref="saveTagInput"
                size="small"
                @keyup.enter.native="handleInputConfirm(scope.row)"
                @blur="handleInputConfirm(scope.row)"
              >
              </el-input>
              <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type='index' :resizable='false' label='#'></el-table-column>
            <el-table-column label='参数名称' prop='attr_name'></el-table-column>
            <el-table-column label='操作'>
              <template slot-scope='scope'>
                <el-button type='primary' icon='el-icon-edit' size='mini' @click='showEditDialog(scope.row.attr_id)'>
                  编辑
                </el-button>
                <el-button type='danger' icon='el-icon-delete' size='mini' @click='removeParams(scope.row.attr_id)'>删除
                </el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <el-dialog
      :title="'添加'+titleText"
      :visible.sync='addDialogVisible'
      @close='addDialogClosed'
      width='50%'>
      <el-form :model='addForm' :rules='addFormRules' ref='addFormRef' label-width='100px'>
        <el-form-item :label='titleText' prop='attr_name'>
          <el-input v-model='addForm.attr_name'></el-input>
        </el-form-item>
      </el-form>
      <span slot='footer' class='dialog-footer'>
        <el-button @click='addDialogVisible = false'>取 消</el-button>
        <el-button type='primary' @click='addParams'>确 定</el-button>
      </span>
    </el-dialog>
    <el-dialog
      :title="'修改'+titleText"
      :visible.sync='editDialogVisible'
      @close='editDialogClosed'
      width='50%'>
      <el-form :model='editForm' :rules='editFormRules' ref='editFormRef' label-width='100px'>
        <el-form-item :label='titleText' prop='attr_name'>
          <el-input v-model='editForm.attr_name'></el-input>
        </el-form-item>
      </el-form>
      <span slot='footer' class='dialog-footer'>
        <el-button @click='editDialogVisible = false'>取 消</el-button>
        <el-button type='primary' @click='editParams'>确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'params',
  data () {
    return {
      // 控制按钮与文本框的切换显示
      inputVisible: false,
      inputValue: '',
      catelist: [],
      activeName: 'many',
      manyTableData: [],
      onlyTableData: [],
      cateProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectedCateKeys: [],
      addDialogVisible: false,
      addForm: {
        attr_name: ''
      },
      addFormRules: {
        attr_name: [{
          required: true,
          message: '请输入参数名称',
          trigger: 'blur'
        }]
      },
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        attr_name: [{
          required: true,
          message: '请输入参数名称',
          trigger: 'blur'
        }]
      }
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败！')
      }
      this.catelist = res.data
    },
    handleChange () {
      this.getParamsData()
    },
    handleTabClick () {
      console.log(this.activeName)
      this.getParamsData()
    },
    async getParamsData () {
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys.length = 0
        this.manyTableData = []
        this.onlyTableData = []
        return
      }
      const { data: res } =
        await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败！')
      }
      res.data.forEach(items => {
        items.attr_vals = items.attr_vals ? items.attr_vals.split(' ') : []
        items.inputVisible = false
        items.inputValue = ''
      })
      console.log(res.data)
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    addParams () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败！')
        }
        this.$message.success('添加参数成功！')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    async showEditDialog (attrId) {
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${attrId}`, { params: { attr_sel: this.activeName } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数信息失败！')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    editParams () {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`, {
          attr_name: this.editForm.attr_name,
          attr_sel: this.activeName
        })
        if (res.meta.status !== 200) {
          return this.$message.error('修改参数失败！')
        }
        this.$message.success('修改参数成功！')
        this.getParamsData()
        this.editDialogVisible = false
      })
    },
    removeParams (attrId) {
      this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(async () => {
        const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${attrId}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除参数失败！')
        }
        this.$message({
          type: 'success',
          message: '删除成功!'
        })
        this.getParamsData()
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        })
      })
    },
    async handleInputConfirm (row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrVals(row)
    },
    showInput (row) {
      row.inputVisible = true
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    async saveAttrVals (row) {
      // 发起请求
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
        { attr_name: row.attr_name, attr_sel: row.attr_sel, attr_vals: row.attr_vals.join(' ') })
      if (res.meta.status !== 200) {
        return this.$message.error('修改参数项失败！')
      }
      this.$message.success('修改参数项成功！')
    },
    // 删除
    handleClose (i, row) {
      row.attr_vals.splice(i, 1)
      this.saveAttrVals(row)
    }
  },
  computed: {
    isButtonDisable () {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    cateId () {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    titleText () {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>

<style lang='less' scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag{
  margin:10px;
}
.input-new-tag{
  width: 120px;
}
</style>
